Characteristics Of The Distinctive Bloodstain Patterns Essay

Blood vessels are hollow (this hollow space is called the lumen) so as to allow the blood to pass through. They are also lined with endothelium, which prevents the clotting of the blood that passes through.

It is flung off the weapon or tool during and after the act as a result of centrifugal force. Cast-off spatter is often elliptical in shape which is why it is easily confused with arterial spurting (Sutton, 1998). However, it can also resemble a typical medium velocity droplet any time the blood hits a surface. For example, a blow to the top of the head with an over head strike or simply cast off forming from blood dripping off a weapon after use will result in a similar pattern to a medium or low velocity droplet. Smooth metallic weaponry used will generate a more profound pattern than a textured weapon. In other words an aluminum baseball bat will yield a greater amount of cast off blood than a wooden baseball bat.

The general charactertics of blood are color, composition, and pH. The composition of blood is determined by collecting blood from a person then it’s placed in a centrifuge which shows plasma is 55% of whole blood and 45 % is erythrocytes. Another name for red blood cells is erythrocytes which are small sacs of blood that carry oxygen and

For this experiment student will identify the individual blood types through the antigen and antibody reaction by using the anti- A, Anti- B and Anti- Rh serums we will be able to identify the different types of blood. Red blood cells also known as erythrocyte are small cells shaped like an oval however they have a plasma membrane but no nucleus. Hemoglobin is the protein that allows the red blood cells to bind easily with oxygen. While hematopoiesis is known as blood cell formation. The independent variable would be the Red blood cells. While the dependent variable would be the Antibodies and the antigens

Using your knowledge of the pathway of blood, explain the flow of blood through the

To name the two major components of blood and state their average percentages in whole blood.

There were two pieces of evidence that came into question with regards to blood spatter. In the 1956 trial Gerber, the coroner, claimed that an outline in blood on one of the pillows resembled that of a surgical tool but was unable to identify the surgical tool. Gerber would have concluded this observation by believing the bloodstain pattern was a transfer pattern. It was concluded however, that the result of the blood stain on the pillow came from another pillow overlapping it.

On the other hand blood spatter on a rough surface creates a blood stain with japed edges. Also Blood strains spread more in softer surfaces. Blood usually makes a spherical shape after separating from the blood source, this shape caused by the surface tension of the blood. The blood drop to pull itself in; both horizontally and vertically due to its surface tension, and will maintain its shape until it collides with something. Blood usually will not break unless acted on by a force, and the force has to be great enough to overcome surface tension. When a drop of blood hits the floor at a 90 degree angle the spatter will be round. A low-velocity spatter will be dependent on height, when distance fallen increases the blood spatter will

A 13 year old is studying blood in school, and has asked some questions that haven't been answered in class. I will answer

Bloodstain pattern analysis (BPA), known in the criminal justice field as blood splatter analysis, has been studied since the 1890s. Blood splatter, or bloodstain pattern constructional readings, is a technique that seeks to piece together the incident that caused an individual’s bleeding. Understanding blood splatter on a wall or various surfaces can be instrumental in formulating if a crime was committed and if the blood discovered at the crime scene can be used as evidence. The first documentation of blood splatter research occurred at the Institute for Forensic Medicine in Poland, by Dr. Eduard Piotrowski . During Dr. Piotrowski’s research and documentation period, where he used live bunnies to research blood splatter from head

As I said about there are many forms of blood splatter patterns for example a single blood drop. Depending on the distance the blood drop as fallen from, it can be a little small drop to a more splattered expanded out drop. When a blood drop is affected by something other than force, it can change the characteristics of the blood drop splatter. Blood in flight is caused by a different source than gravity for instance a gun, or a heavy object. When you get shot blood splatters from the exit wound at a fast pace due to the velocity of the bullet. The direction the bullet went in can change the blood splatter characteristics and the distance it was shot at. A blunt heavy item can also cause blood splatter similar to a gun shot.

Emphasis is exemplified by Goya when he painted a horizontal line to represent death. Convergence is when many elements point to one thing, again this is exemplified when he painted the riffles horizontally pointing at one of the prisoners brightly painted in yellow. Moreover it focuses the attention of the viewer to that one prisoner painted brighter than the others and is easily notice when the painting is first viewed.

Blood is a non-newtonian fluid that contains many components. One such component is red blood cells. Due to the red blood cells having the tendency to clump together at low velocities, calcium chloride was added in order to cause a thrombus formation. The blood used in their experiment was sheep’s blood.

* To understand how to interpret a graph of blood Bessel radius versus blood flow rate.

Blood chemistry or blood test is identifying the different levels of chemical ingredients found in the blood. The analysis of these substances provides clues to a patient’s condition and the functioning of the major body systems such as, blood sugar levels, liver functions, essential nutrients etc. This helps doctors in diagnosing the patient’s conditions much easier and quicker.